MRI: Acquisition of a High Magnetic Field and Cryogen-Free Physical Property Measurement System

MRI：获取高磁场和无冷冻剂物理特性测量系统

• 批准号: 1229195
• 负责人: Gang Xiao
• 金额: $ 27.98万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1229195&HistoricalAwards=false
• 关键词: MRI; Acquisition; Magnetic; Field; Cryogen

This award supports the acquisition of a High Magnetic Field and Cryogen-Free Physical Property Measurement System (PPMS) at Brown University. It will enable experimental studies of the physical properties of materials including magnetism, electron transport, and thermodynamic properties. The instrument will provide fundamental information about new materials actively being studied by scientists from the disciplines of Physics, Chemistry, and Engineering. Proposed research using the PPMS includes: (1) spintronics based on half-metallic magnetic nanostructures, (2) magnetic nanoparticles for data storage, energy storage and biomedical applications, (3) low dimensional superconducting nanostructures, (4) type-II superconductors, (5) novel superconducting and spin liquid states, and (6) semiconductor hetero-nanowires. By studying physical properties over a wide range of temperatures and fields, scientists at Brown will uncover the quantum mechanical behavior and physical mechanisms underlying many novel and revolutionary materials. With this new instrument, they will have the ability to investigate the ground state properties of their materials directly, rather than rely on mere extrapolations of measurements conducted at room temperature or low magnetic fields. Since the PPMS provides a myriad of physical characterizations, they will be able to develop theoretical models that can then be almost immediately tested by multiple types of measurements and their correlations. The PPMS will open up new research opportunities for the materials research programs, and will help to reveal as yet unexplored physical phenomena while simultaneously producing devices of great practical significance. The proposed research not only will advance the development of material science, but also will lead to prototyping the next generations of spin-based electronics and semiconductor devices, thereby directly influencing the future development of the semiconductor industry.This instrument will be used as an educational tool for graduate and undergraduate training. With this instrument, they will be able to teach students the fundamental properties of modern materials, develop a deeper understanding of physical mechanisms, and also provide invaluable practical experience in advanced characterization techniques. In particular, undergraduate students will use this sophisticated instrument for their research projects, thereby offering a unique opportunity for high-level investigations. These students will form the next generation of materials scientists in the United States, ensuring the development of the field and helping the US assume and maintain a preeminent role. The proposed research will also generate new basic knowledge and data on novel spintronic, superconducting, and semiconductor materials that can be leveraged to develop potentially revolutionary devices for widespread implementation in multiple arenas including information technology, medicine, and education.

该奖项支持布朗大学收购高磁场和无低温物理特性测量系统（PPMS）。 它将使实验研究的材料的物理性质，包括磁性，电子传输和热力学性质。该仪器将提供有关物理，化学和工程学科科学家正在积极研究的新材料的基本信息。 使用PPMS的拟议研究包括：（1）基于半金属磁性纳米结构的自旋电子学，（2）用于数据存储，能量存储和生物医学应用的磁性纳米颗粒，（3）低维超导纳米结构，（4）II型超导体，（5）新型超导和自旋液体状态，以及（6）半导体异质纳米线。通过研究各种温度和领域的物理特性，布朗大学的科学家们将揭示许多新颖和革命性材料背后的量子力学行为和物理机制。有了这种新仪器，他们将有能力直接研究其材料的基态性质，而不是仅仅依赖于在室温或低磁场下进行的测量的外推。 由于PPMS提供了无数的物理特性，他们将能够开发理论模型，然后几乎可以立即通过多种类型的测量及其相关性进行测试。PPMS将为材料研究计划开辟新的研究机会，并将有助于揭示尚未探索的物理现象，同时生产具有重要实际意义的设备。 这项研究不仅将推动材料科学的发展，而且将导致下一代基于自旋的电子和半导体器件的原型，从而直接影响半导体工业的未来发展。该仪器将被用作研究生和本科生培训的教育工具。有了这个仪器，他们将能够教学生现代材料的基本特性，发展物理机制的更深入的理解，并提供先进的表征技术的宝贵实践经验。特别是，本科生将使用这种先进的仪器进行他们的研究项目，从而为高层次的调查提供了一个独特的机会。 这些学生将成为美国下一代材料科学家，确保该领域的发展，并帮助美国承担和保持卓越的作用。拟议的研究还将产生关于新型自旋电子、超导和半导体材料的新的基础知识和数据，这些材料可用于开发潜在的革命性设备，以便在包括信息技术、医学和教育在内的多个领域广泛实施。